diff --git a/chipflow_lib/steps/silicon.py b/chipflow_lib/steps/silicon.py
index 0ecbd187..a9031bfa 100644
--- a/chipflow_lib/steps/silicon.py
+++ b/chipflow_lib/steps/silicon.py
@@ -136,7 +136,7 @@ def submit(self, rtlil_path, *, dry_run=False):
             "dependency_versions": dep_versions,
             "silicon": {
                 "process": self.silicon_config["process"],
-                "package": self.silicon_config["package"],
+                "pad_ring": self.silicon_config["package"],
                 "pads": pads,
                 "power": self.silicon_config.get("power", {})
             }
diff --git a/tests/test_silicon_step.py b/tests/test_silicon_step.py
index 0df19433..f3ea5f37 100644
--- a/tests/test_silicon_step.py
+++ b/tests/test_silicon_step.py
@@ -77,7 +77,7 @@ def test_submit_happy_path(self, mock_requests_post, mock_dotenv):
         print(pformat(config))
         assert config["silicon"] == {
             'process': 'ihp_sg13g2',
-            'package': 'pga144',
+            'pad_ring': 'pga144',
             'pads': {},
             'power': {
                 'vss': {'loc': 'N1'},